Citra won't display dark background/ Linux Bug?

Issue:
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For whatever reason I can’t actually achieve a black background when the game is running. The best I can achieve is a deep grey color as shown in the photos. I messed around in the config file and even setting the render options to absolute black doesn’t make a difference. I don’t have this issue with Windows.

System Information

Diagnostic Log
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citra_log.txt (55.1 KB)